var util=require('util');
function Base(){
    this.name='base';
    this.base=1991;
    this.sayHello=function(){
        console.log('hello'+this.name);
    };
}

Base.prototype.showName=function(){
    console.log(this.name);
};

function Sub(){
    this.name='sub';
}

util.inherits(Sub,Base);
var objBase=new Base();
objBase.showName();
objBase.sayHello();
console.log(objBase);
var objSub=new Sub();
//objSub.showName();
objSub.sayHello();
console.log(objSub);
